The Duan Albanach says that he reigned "without dissension", but there is a report of an expedition by Conall and Colmán Bec mac Diarmato of the Southern Uí Néill to Iardoaman in the Annals of Ulster for 568.
Óengus II (before 780–834), king of Picts, a/k/a Onuist, Hungus or Angus, from 820 until 834, traditionally associated with cult of Saint Andrew and flag of Scotland; included in Duan Albanach's praise poem from reign of Máel Coluim